Dalibor Topic wrote:
>--- classpath/java/io/Serializable.java Sat Nov 17 15:00:13 2001
>+++ patched/java/io/Serializable.java Sat Nov 17 16:04:01 2001
>@@ -40,6 +40,7 @@
> */
> public interface Serializable
> {
>+ static final long serialVersionUID = 1196656838076753133L;
> } // interface Serializable
>
This is redundant. An explicit serialVersionUID is only required when a
classes implementation may be different from the JDK version (different
private fields, for example), or where a class has evolved over time and
needs to be backward-compatible with serialized instances from the older
versions.
You can write your own simple serialver utility to verify this:
import java.io.*;
public class SerialVer
{
public static void main(String[] args) throws ClassNotFoundException
{
String className = args[0];
Class cl = Class.forName(className);
ObjectStreamClass osc = ObjectStreamClass.lookup(cl);
System.out.println (osc.getSerialVersionUID());
}
}
$ serialver java.io.Serializable
java.io.Serializable: static final long serialVersionUID =
1196656838076753133L;
$ gij SerialVer java.io.Serializable
1196656838076753133
regards,
Bryce.
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